Machine for shaping wire strands for screens



April 17, 1951 F. F."DMuEm-iAUERv 2,549,061

MACHINE EoR SHARING WIRE STR/mns EoR scREENs INVENTOR. Z oR/AN fDAUaN//Az/a.

MM ATTORNEYS.

April 17, 1951 F. F. DAUENHAUER 2,549,061

MACHINE FOR SHAPING WIRE STRANDS FOR SCREENS Filed Aug. 22, 1947' 8 Sheets-Sheet 2 TTOHNEYS.

April 17,-1951 F. F. DAUENHAUr-:R 2,549,061

MACHINE FOR SHAPING WIRE STRANDS FOR SCREENS Filed Aug. 22, 1947 s sheets-sheet s @gc '9. V 'i I 87 IN VEN TOR.

April 17, 1951 F. F. DAUENHAUER 2,549,061

MACHINE FOR SHAPING WIRE STRANDS FOR SCREENS Filed Aug. 22, 1947 sheets-sheet 4 INVENTOR. U/P/A-/v FZ7/4 Uf/v//AaE/P.

BY v M April 17, 1951 F. F. DAUENHAUER MACHINE FOR SHAPING WIRE STRANDS EOR SCREENS Filed Aug. 22, 1947 8 Sheets-Sheet 5 INVENTOR. f2 QR/A/vE/:UEA/HAUER.

l V A 7o/PME Ys.

April 17, 1951 F. F. DAuENHAUER 2,549,061

MACHINE EoR SEAPING WIRE sTRANDs Foa SCREENS Filed Aug. zzf 1947 e sheets-sheet 6 INVENTOR. ORzA/VZA UNHAz/zz BY i mi 'LM April 17, 1951 F. DAUENHAUER 2,549,061

MACHINE FOR SHAPING WIRE STRANDS FOR SCREENS Filed Aug. 22, 1947 8 Shee,ts-Sheet '7 L 55 JY www INI/EN TOR. ORJANEBAZ/LN//AU/ER A TURA/5x5.

April 17, 1951 F. F. DAuENHAUr-:R 2,549,061

MACHINE FOR SHARING WIRE sTRANDs FOR SCREENS Filed Aug. 22, 1947 A8 sheets-sheet s M i E INV EN TOR.

a flm/fwAaM//Az//a @if 32 BY mi J Patented Apr. 17, 1951 MACHINE FOR SHAPINGrV WIRE STRANDS EDR.' SCREENS Florian F'. Dauenhauer, `Santa Rosa, Calif.

Applica/.tion August 22, 1947, Serial No. 770,057

1.6 Qlaims.- 1

An object of my invention is to provide a machine for shapingwire strands for screens which is especially designed to shape the wire strands used in making the screen type conveyor shown in my copending application Serial No. 575,374, now abandoned, led January 3lI 1945. The type of screen conveyor disclosed in my co-` pending case has a flat mesh which will flex in one direction, but will not flex in the opposite direction.

A furtherobject of my invention is to provide a machine for shaping wire strands for screens which will automatically feed and bend a wire into the desired shapeto form a strand of the screen. The loop-shaped strand can be of any length desired to make a screen of the desired dimensions. The screen made from the strands can be stationary or it can be formed into an endless belt and be carried by drums.

Other objects and advantages will appear in the following specification, and the novel features of the devicel will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming a part of this application, in which:

Figure 1 is a side elevation of the machine;

Figure 2 is a top plan view;

Figure 3 is an enlarged transverse section of an adjusting means for the wire forming die;

Figure i is a top plan view of Figure 3;

Figure 5 is an enlarged transverse section taken substantially along the line V-V of Figure 1;

Figure 6 is an enlarged end elevation when looking at the left hand end of Figure 1;

Figure 7 is an enlarged transverse section, taken along the line VII- VIVI of Figure 2;

Figure 8 is a side elevation of a portion of the machine when looking at the opposite side to that shown in Figure 1; A

Figure 9 is an enlarged longitudinal section taken along the line IX-IX of Figure `2, and illustrates the cam for moving the wire strand pulling block;

Figure l0 is a transverse section taken along the line X-X of Figure 9, and illustrates the cam follower for the strand pulling block;

Fig-ure 11 is an enlarged longitudinal section taken along the line XI-XI of Figure 2, and shows the cam and associate mechanism for crimping the wire;

Figure 12 is a transverse section taken along the line XII- XII of Figure 11;

Figure 13 is a horizontal section taken along the line XIII-XIII of Figure 12;

Figure 14 is an enlarged longitudinal section taken along the line XIV-XIV of Figure 2, and illustrates the cam .for operating the stripping pins that remove the wire strand from the form.- ingdies;

Figure 15 is an enlarged longitudinal section tak-on along the XV-:XV of Figure 2i and illustrates the @am that actuator the forward stripping block for removing the wire. strand iron; the forming dios;

Figure lo is an enlarged transverse sotoe taken along the line XVI-XVI of Figure 9,` and illustrates the guide block;

Figure 1 7 is a portion of Figure 8 enlarged andf shows the mechanism for removing the wire irorn the die;

Figure 18 is a transverse section taken along the line XVIIITXVI'II of Figure 17;

Figure `19 is a perspective yiew of the wire removing pinsv and lifting bar shown in a horizontal position for clarity although they are vertically arranged in the machine; f l i Figure 20 is a transverse section taken along the line of Figure 17;

Figure 21 is an enlarged perspective view of tha wire strand pulling die assembly when looking in the direction of the arrow in Figure 2;

.Fi-euro 2.2 1S. e porsoootivo View of the polling die for the wire strand when looking in the direc-v tioo of the arrow XXII. lo Fierro 21;

Figure `273 is `a perspective View of the pulling die housing when looking in the direction 'of the arrow XXIII in Figure 21;

Figure. 24 iS a transverse Section taken ,alors the line XXIV-XXIV of Figure 21, showing the vertical guide rod and stops for the pulling die housing;

Figure V25 is a perspective View of a wireeiorinine die when looking in the direction of the arrow XXV in Figure 2l:

Figure 26 is a perspective View of a portion Aoi a wire strand and illustrates the progressive steps of shaping and crimping of the loops; l

Figure 27 is a top plan view of a machine por: tion showing the Vforming die, with the pulling die and housing removed;

,Figure 28 1S 'on emerso@ longitudinal section taken along the line yXXVIII-fXXVIII of Figure 2, with .the Crook Shaft rotated 9.0. irom Aits Sharif ing position;

Figure 29 is a plan view of the pantograph for moving the wire-forming die and illustrates its position when the orank shaft has rotated through i. e., the saine position as shown Figure 28;

Figure 3l) is an enlarged transverse section taken along the line o f Figure 27;

Figure l31 is a View similar to Figure 11 but shows a wire crimping cam rotated 90 beyond its starting position;

Figure 32 is a -vertical section taken along the line XXXIL-XXXH of Figure 3.1 and is 1er to. Figure 12. but Showing the orimons completed @fior the crimping @am v has moved 90 from its Startins position;

Figure 34 is similar to Figure 14, and shows 1 the cam for operating the wire strand stripping fingers, advanced 180 from its starting position; Figure 35 is a section taken along the line XIQV--XXXV of Figure 36 and is similar lto Figure 20, but shows the die-stripping block starting to engage wire strand forremoving it from the die;

Figure 36 isa horizontal section taken along the line XXXVI-XXXVI of Figure 35 just under the top;

g Figure 37 is a horizontal section taken along the line XXXVII-XXXVII of Figure 35, along the upper surface of the machine top;

Figure 38 is a top plan view ofthe wire-receiving die after the loop has been formed in the wire strand;

Figure 39 is a View similar to Figure 18 with the wire removing pins lifting the wire clear of the forming die; and

Figure 40 is a plan View of a wire screen made from a plurality of the preformed wire strands.

While I have shown only the preferred form of my invention, it should be understood that various changes or modifications may be made Within the scope of the appended claims without departing from the spirit and scope of the invention.

In carrying out my invention, I provide a frame A with a top` B on which the Wire-shaping dies for forming the reverse loops are mounted.` The crimping means for the alternate loops is also carriedby the top. I will first describe the connections between the source of power and the main crank shaft, and then will successively describe the various dies and associate mechanisms for acting on the wire strand to form it into the Y desired shape, and this will be followed by a brief description of the operation vof the entire machine. y

'Drive connections for the main shaft ',Reference to Figures 1, 2, 5 and 6 illustrates a motor C connected to a large pulley I Aby a belt 2. The pulley/is mounted on `a countershaft 3 to which a small pulley I is secured, see Figure 5. Connections between a main crank shaft 5 and the pulley 4 is effected by a belt y6 and a large pulley 'I mounted on the crankshaft. Bearings 8 support the crankshaft on the top B. Any source of power may be used and any meansA for connecting the crankshaft to the power source may be resorted to. l I will now describe the means for receiving the wire from which the looped and crimpedwire strand is formed.

Wire-receiving and forming dies A wire-stripping block TI is associated with member G and has longitudinally extending grooves Iii and I5 therein Yfor receiving the looped ends EI and E2 of the completed wire which will be A explained hereinafter more fully. Initially, the end of the wire E isplaced in the groove I4 so that at the start of the wire-forming operation, the Wire will be received in aligned grooves I2, I 3

and I4 provided in the end die D, the transverseA die F and the wire-stripping block respectively The member GV has, transversely extending Wire-receivingv This is clearly shown in Figure 27.

grooves I6 that are inclined with respect to each other in the manner shown in Figure 27.

Wire Zoop-forming die F It is best at this time to describe the operation of the wire loop-forming die F. The die is shown in perspective in Figure 25 and it has a tonguel ceive pins 24 and 25, see also Figure 33, thatV pivotally secure the head to levers 26 and 21 which in turn are pivotally secured to thel top B at 28o and 28d respectively. YThe lever 26 has inclined an arm 26g. that is integral therewith and has its lfree'end slidably connected to a pitman 28, see Figure 33, by a clevis 29 pivoted to the arm 25a at 3D and carrying a bolt 29a slidably received in a slotted guide 3 I, carried by the pitman 28.

A link 32 is pivoted to the levers 26 and 21 at 33 and 3G and completes the formation ofthe Illa, see Figure 7. The end die has an inclined,

wire-shaping edge II for cooperating with a loop-forming die Fin a manner hereinafter described. 'Ihe end die D has a longitudinally extending wire-receiving groove I2 in its upper surpantograph. The lever 26 is Vadjustable as to' length between the pivot points 2li and 33 for altering the movement of the formingV die F4 caused by the pantograph. Adjusting bolts 35 are tightened after the lever 26 is corrected to the desired length. The'lever 26 is in two sections and the bolts 35 secure these together as a unit. The pitman 28 is operatively connectedY crank-arm 36 connected tothe crank-shaft 5 so as to be rotated thereby and the pitman will swing the pantograph H from the position shown u in this figure into vthe one shown in Figure 33.

6:5-, 'It is necessary to 'maintain the axis of thedie tongue I7 at right angles to the longitudinal travel of the end Die D at al1 timesand I accomplish this by connecting one end of a link 39 to the pivot point 25 of the pantograph H and the other end `to a lever 40 at III. The

lever i6 is also used for Vreciprocating the end vdie'D and is pivotally connected thereto by af bolt 42 which lis carried bythe die D and is slidably received in a slot provided in the lever. The lever 40 is pivoted to an arm 43 at 44 and is shown in Figure 26.

Figures `3 and 4 illustrate how `the -armcan -be altered in its position.

Referring to Figure 3 it will be see-n that a cap screw [l5 holds `an eccentric sleeve 4t to the top B and the sleeve has an eccentric portion 41 received in an opening in the arm `t3. The sleeve may be rotated on the -cap screw to rotate the eccentric fifi for adjusting the arm. The cap screw may then be tightened for holding the eccentric in the desired position. This changes the pivot point d4. A disc 48 is placed over the arm 43 to hold it in place'. Any other adjustment for the arm 43 maybe used if desired. The adjustment of the pivot point All and the adjustment of the distance between the pivot points 24 and 33 of the pantograph H, alters the movement of the transverse die F so that it will move transversely :when the crank-shaft is rotated and will maintain its axis at right angles to the longitudinal axisfof the end die D, during this movement.V

Figure t8 shows in enlarged detail the vwire strand holding member G with an inclined wireshaping edge Ail. Figure 27 illustrates the starting position of the transverse die F in full lines and the final position of the die in dot dash lines. The arrowed line a in this figure shows how the die travels to the right and down. `By the time the die F reaches the dot dash line posi* tion of Figure 27, the end die D will have its wire-shaping edge Il forcing a portion'of the wire .E against the wire-shaping side I8 of the die F, and the wire-shaping side I9 of the die F will be forcing another portion of .the wire against the edge 49 of the member G. Figure 38 'shows the completed transaction with the die F in dot dash lines and at the end of its stroke and the wire E formed between the ends Il and 49 of the member G and the sides I8 and `I9 of the die.

The wedge-shaped loop E2 is formed and this The sides Aof the loop di verge from each other from the open to the closed end oi the loop. `The closed end of the lop is formed by the groove i3 in the die F. As

the loop-forming step is repeated, the wire strand is intermittently advanced by a means presently to be described and this causes the loops EI to be formed and to extend opposite to the loops E2. In fact the inclined sides of the loop E2 form the inclined sides of the adjacent loops EI. The movement of the die F is not only timed with movement of the end die D so that a loop in the wire will be formed, but the die F will remain in its advanced position long enough to permit the loop E2 to be raised oil from the die by a mechanism now to be described.

M cans for stripping Zoop EZ from forming die Figure 2 shows the crank-shaft `5 provided with four cams. The cam J is disposed nearest the large pulley 'l and operates a mechanism to lift the formed wire loop E2 above the diev F, preparatory to moving the formed wire strand to the right. I refer to the cam J as thewire strand removing cam for the die F. Next to the cam J I place cam K for actuating a mechanism for stripping the formed wire strand from the holding member G preparatory to moving the strand to the next position.

A cam L is placed next to the cam K and actuates a mechanism for forming a crimp in the closed end of the loop E2, this crimp being clearly shown in Figure 26. The fourth cam' isindicated at Maud actuates a wire strandpull ing mechanism 'for moving the completed `wire strand, stepwise along the wire strand holding member G. All of these four cams operate in proper order and are timed with the pantograph actuating mechanism so that a wire strand having reversely extending loops, is formed, all ofthe loops .extending in one direction being crimped while those extending in the opposite direction are not crimped. The completed -wire strand is shown in Figure 26 excepting that `thewleft hand loop E2 has yet to be crimped. Figure 40 shows a number of the wire strands having their crimped loops E2 interconnected with the uncrlimped loops EI or the adjacent strand to form a screen.

The wire loop stripping cam J is illustrated `in detail in Figures 15, 18, 19 and 39. Referring to Figure 15, it will be seen that the crank-shaft -5 supports the cam and the cam is provided with a high .point which is tooth-shaped as-at 5D. A bracket 5I pivotally supports a lever 52 at 53 and a cam-following roller 54 is shown contacting with the low portion of the cam in Figure 15. The tooth or high portion 5B of the cam is removed substantially 180 away from the roller 54 as indicated in this gure for the purpose of giving the loop forming die F an opportunity to form the loop E2 which requires about 130 of rotation of the shaft 5.

nA plunger 55 extends through the top B and Figure 18 shows this plunger contacting -a rocker arm 56 that is pivotally mounted at 51 to a bracket 53, the latter being suspended from the underside of the top B. A `bracket 59 with adjustable stops 59a limits the clockwise swing of the rocker arm 56 caused by the plunger 55.

When the crank 5 rotates through an arc of from its starting position, the cam roller 5l!` will `still be travelling on the low portion of `the cam. The 90 position of the cam J is shown by the dotted lines in Figure 15 and is indicated byV JI. During this 90 rotation of the crankshaft, the pantograph H has advanced the transversely moveable die F to the position shown in Figure 29 and the wire E has a portion started to be formed into the loop E2. The end die D is also shown advanced toward the loop-forming die F.

The next position of the cam J in Figure l5 shows it contacting the roller 54 and ready to swing the lever 52 into the dotted line position. The o position of the cam J from its start-` ing position is indicated by J2. Figure 33 indicates how the die F has completed its wire loopforming stroke when the crank-shaft has rotated about 170 from its starting position. The slotted guide 3I on the pitman 28 will permit lthe pantograph and die Fas well as the die Dto remain in their moved position for the next 90 rotation of the crank-shaft. It is during this lost motion period of the dies D and F 'that the wire stripping cam J actuates the lever 52.

The cam J starts to rock the lever 52 when the cam is rotated about 170 past its starting position. At the 170 position, the loop forming die F will have completed its stroke in one direction to form the loop E2 and the end die D will have completed its stroke into abutting relation with the die F so that the edge I I of the die D and the side I8 of the die F will form the inclined side of the wire loop. A rotation of the crank-shaft 5 from the 170 position to the position will take place to cause the cam J to actuate its wire loop mechanism which will now be described. The action is fast because it vinust be completed while the die F is in its loop forming position.

Figure 18 shows the lever 52 moving the plung er 55 downwardly. The plunger 55 acts on the rocker arm 56 that contacts with a springpressed plunger 68 when the plunger 55 is de-V pressed. A perspective view of the plunger 60 is illustrated in Figure 19. The plunger is shown in a horizon-position in this gure for clarity purposes although in reality the plunger is vertically disposed. Y

The plunger 6U supports a base 6I above the top B, the base being moveable between the upper surface of the top and the under surface of y theguide plates 8, see Figure 18. The base 6I supports pins 52 and 63. Figure 38 illustrates how the top of the pin 62 is recessed at 62a to Vprovide a shoulder that will lift the wire loop EI when the pin is lifted. The other pin 63 is recessed atf63a to receive the closed portion of the wire loop E2 and the shoulder provided on the pin will lift the loop clear of the die F when the pin is lifted. The loop forming die F is recessed at 64, see Figure 25, to receive the pin 63 when the die is at the limit of its stroke and before it starts on its return movement. The two pins 62 and 63 lift the loop E2 from the die F before the die starts on its return movement.

Figure 39 indicates the full upward movement of the spring-pressed plunger 60. The spring 65 of the'plunger 66, see Figure 18, is compressed when the pins 62 and 63 are in their raised position. The loop E2 will be raised out of the groove I3 in the die F. The pins will be returned to their normal position by the spring 65 as soon as the roller 54 rides over the high point 50 of the cam J. B-oth the wire loop E2 and the pins 62 and 63 will be freed from the die F before the die starts on its return movement.

AMeans ,for stripping wire from holding member G At about the time the cam J permits the stripping pins 62 and 63 to return to normal position, the cam K comes into action for stripping the wire strand from the holdingrmember G. This cam and its associate mechanism is illustrated in. Figures 14, 20, 34, 35 and 36. The cam is mounted on the crank shaft 5 and has a high portion 65 and a low portion 66 on which a cam roller 61 rides. The roller is carried by a lever 68 which is pivoted at 69 to a bracket 10 that is mounted on the top B. When the machine is in its starting position with the parts as shown in Figure 2, the cam K will be in the full line position illustrated in Figure 14. The cam roller 61 Will have just left the high portion 65 of the cam and will have started on its travel over the low portion 86 that extends through an arc greater than 180.

When the crank shaft 5 rotates through an are of 90, the rollerwill still be on the low portion. The 90 position of the cam is indicated at KI. The next 90 position or 180 from the starting point is indicated by K2. The cam is about ready to swing the lever e8 and this tairesv place when the cam reaches the 200 position.

The lever 68 presses downwardly on a plunger 1I that is slidably carried by the top B. Figure 20 illustrates the plunger actuating a dual rocker arm 12 that is pivotally carried by brackets 13,

see Figure 36, which are suspended from the top B. The other ends of the rocker arms carry adjusting screws 14 which contact with a cross bar 15 that is connected to two spring-pressed plungl ers'16. ,y

parallel walls of the block is transversely grooved at I6. The longitudinal grooves I4 and I5 also previously mentioned are formed in the top edges of the parallel sides of the block 11 and when the block is 'in its normal position, the

igrooves I4 and I5 lie in the same plane as theV grooves I6.

The raising of the block 11 by the cam K removes the Wire from the grooves I6 and moves it into the transverse grooves 18 of a wire pulling member N shown in Figures 22 and 35. The grooves 18 are-complemental to the grooves I6 and therefore will receive any portion of the formed Wire as it is transferred from the holding member G to the pulling or transferring member N. The member N is slidably mounted in a housing-P which is rectangular in shape as shown in Figure 23 and is provided with guide eyelets 19 adjacent to its four corners. Figures 1, 2 and 1'1'illustrate how guide bolts 86 slidably receive the guide eyelets so that the housing can move vertically on the bolts. Springs 8| are mounted on the bolts and are placed between the eyelets 19 and nuts 82. Figures 21 and 23 show the eyelets 19 provided with stop pins 83 that depend below the eyelets and normally contact with the uper surfaces of the members IU and Ina due to the force of the springs 8l.

Figures 34 and 35 illustrate the actual lifting operation of the block 11. The cam K in Figure movement raises the wire E from the holding member G and transfers it to the Wire-moving member N. Any number of loops E2 may bel formed in the wire and the transferring from the member G to the member N will be effected Y by the raising of the block 11.

Figure 21 shows a bracket 84 with a keeper bar secured thereto for holding the wire pulling member N from upward movement with respect to the housing P while still permitting longitudinal movement of the 'member N within the housing. The cam K has its-high side 65 of sufficient length to permit the member N to be moved while the block 11 is holding the wire in the grooves 18 of the member N. Thus far in the operation of the'machine I have only described the forming of the loop E2 by the die F and the removal of the loop from the die by the pins'62 and 63 which move quickly while the die F is in its extended loop-forming position. I have also described how the block 11 is moved upwardly by the cam K at about the same time as the cam J moves the pins upwardly for a short time. The cam K holds the block 11 in raised position While the wire moving member N acts on the wire.

Means for actuating wire-moving member N The means for moving the member N is the cam M and the arrangement is such that the member N will be moved over the die F just 75 priorto the time the pins 62 and 63 transfer thel 9` Wire loop E2 from thedie to the member N. Certain grooves 18 inthe member N will register with the sides of the loop E2 formed by the die F and these grooves will receivethe loop sides when the pins 62 and 83 lift the loop above the die. The member N then moves the loop E2 to the next position where it will be lined up with certain grooves I8 in the hold member G. At this point the holding member G receives the loop in its advanced position.

The cam M and its associate mechanisms is illustrated in Figures 9, 10 and 2-1 to 24, inclusive. The cam is mounted on the shaft and rotates between two cam rollers 86 which in turn are carried by cross heads 81. The cross heads are mounted on parallel arms 88 that have their free ends connected to a member 89 which in turn is secured to the wire-moving member N. The arms 88, member 89 and Wire-moving member N are clearly shown in perspective in Figure 22. In Figure I show how a frame 99 carried by the top B has guides 9| in which the horizontal arms 88 are slidably disposed. The cam rollers 86 may be adjusted toward and away from each other in order to contact with diametrically opposite edge portions of the cam M.

The full line position of the cam M in Figure 9 shows it in its starting position. When the shaft 5 rotates 80, the cam M is in the position Ml and the wire-moving member N has been moved to the left in Figure 9. Another 90 turn of the shaft will rotate the cam M to its M2 position where the wire moving member N will be at its extreme left-half position in Figure 9 and will have a portion overlie the die F which by this time has likewise been moved to its extreme loopforming position. The cam J` now actuates the pins 62 and 63 to lift the formed loop E2 off from the die F and move it into the registering grooves 18 of the member N. At the same time the block 11 is acted upon by its cam K and lifts any wire portion on the member G up into registering grooves of the member N. The cam K will hold the block 11 raised while the cam J will permit the pins 62` and 63 to drop in order that the die F can return.

The remaining 180 rotation ofthe cam M to complete its cycle will move the member N to the right so as to move the formed wire therewith and cause it to` register with the next set of grooves I6 in the holding member G; The cam K will hold the block 11 in raised position from a position of about 235 `from Vstarting up tof about 335 position. The block 11 will then be lowered by the springs 92 and the formed portion of thewire will be transferred from the grooves 18 in the pulling member N to the corresponding grooves |61 in the holding member G.

During the return movement of the parts to starting position, the previously formed loop E2 has been stepped to the right in Figure 9 the distance equal to the width of one loop.

Loop crimping means The loop E2 after being moved away from the die F byy the member `Nris ready to be acted upon by crimping mechanism which isv actuated by the crimping cam L. This` cam and associate mechanism is illustrated Vin Figures 11,` 13, 3l and 32. The cam L in Figure 1.1 is mounted on the shaftV Sfand the cam is in the full' line position indicated at the starting position of the machine. The high point 99 of the cam is, shown. in a position ready to contact; a camroller 94 and swing a lever 95 from the positonshown in Figure l1 vthe loop E2.

into the position shown in Figure 31. The lever is pivoted at 96 to a bracket 91 that in turn is mounted on the top B.

A crimping lever 98 is pivoted at 99 to a bracket |09 that is mounted on one of the plates 8 adjacent to the point where the member N will move the loop E2 in two steps, the first step being to transfer the loop from the die F to the member G and the second step being to advance the loop to its next position on the member G. This p0- sition is clearly shown in Figures 13 and 33. A coil spring |9| has one end resting on the top B and held against lateral movement by a retaining member |92. The crimping lever 98 has a depending projection |02 that receives the upper end of the spring. The spring ||l| holds the outer end of the lever 98 in contact with the lever 95.

The lever 98 has a toe portion |03 that normally underlies the closed end portion of the loop E2. The housing P has an anvil |84, see Figures 12, 13 and 23, that is positioned above the loop E2 when the toe |93 is positioned under the loop. When the high point 93 of the cam L engages the roller 94, see Figure 31, the lever 95 will swing the crimping lever 99 and cause the toe |93 to crimp the closed end of the loop E2 upwardly and against the anvil |89, see Figure 32. The resulting crimp in the loop E2 is illustrated at |95 in Figure 26. The crimping operation takes place during the iirst rotation of the shaft 5 from its starting position. Each loop E2 is crimped in this manner.

The stepwise feeding of the wire E- through A, the die F, forms the loops El` as well as the loops E2, butit is only the loops E2 that have their portions crimped. Figure 26 illustrates thev Figures 2'1 and 30 illustrate the groove I3 in the die F being positioned under a keeper |96 when the die is in its starting position and the groove I3 is aligned with the groove I2y of the die D. The keeper prevents the wire from slipping out of the groove.

Figure 23 shows the housing P provided with a lip |91 at one end and Figures 9 and 17 show the lip overlying the die F to keep the wire in the die groove |`3 while the die is moving to form The crankshaft rotates through 190 from its starting position to cause the die F to form the loop E2. At the same time the cam M moves the member N over the die F and at the proper moment the cam K causes the pins 62 and 63 to transfer the wire loop E2 from the die F to the pulling member N, the sides of the wire loop being received in the grooves 18 of the member N.

The member N moves the loop E2 one step away from the die F while the crankshaft 5 completes the second half of its iirst revolution. The slot 3| in the pitman 28, see Figure 28, permits the die F to remain in moved position while the pins 62 and 63 strip the loop E2` from the die; The formed loop E2 that has been movedoff from the die F by the pins 62 and 63 and moved away from the die by the member N, is transferred to the holding member G at the end of the rst revolution of the crank shaft.

During the movement of the second revolution ofthe crank-shaft, a secondloop E2 isk formed by` the'die F, and this is lifted off froml the die by the pins 62 and 63 and transferred to the member N which again has beenmoved over by the cam M to receive the second loop. At

about the same time, Ythe cam K causes the block ll to raise and move the lrst loop E2 into registering grooves 18 in the member N. The cam K holds the block K in raised position during the returnA movement of the member N. Two loops E2 have now been formed and the machine is ready-to form the third loop E2.

. The rst 90 rotation of the crank-shaft on its third revolution causes the crimping cam L to actuate the crimping lever 98 and cause the toe |03 to crimp the end of the loop E2 as shown in Figures 26 and 32, the rst loop E2 having by this time reached the position where the crimping leverican act on it. The iirst half of the third 'revolution causes the die F to form a third loop E2. The adjacent loops are interconnected by the loops El. The cams J and K actuate wire stripping mechanisms to remove the wire from the die F and the holding member G and transfer -it to the member N which has been moved by its cam N to its furtherest position. The member N then moves the formed wire one step and returns vit to the member G.

These `series of operations take place automaticallyV for each revolution ofthe crank-shaft 5 and in 'proper sequence. The completely formed wire strand is fed from the machine loop by loop and will look like that shown in Figure 26. In forming the screen asshown in Figure 40, the

loops E2 of one wire strand are connected to the loopsV El ofthe adjacent wire strand. As many of these strands as desired may be interconnected to form a screen of the proper size. It is possible to make a wireY belt from the strands as shown in my copending application above referred to.V Y

Iclaim: i

1` In a Wire-shaping machine, a stationary die having aY groove associated therewith for receiving a wire, a moveable die having a Wire receiving groove therein registering with the first-'named groove whenthe moveable die is in normal position, means for moving the moveable die trans- `versely to the Wire and toward the stationary die, a second moveable die having a groove registering with the other two grooves'for receiving the wire, means for moving both moveable dies so that the transverselym-oving die will form a loop in the wire and the stationary die andv other moveable die will cooperate with the transversely moving die to form a loop with a closed end and'inwardly inclined sides, means for lifting the formed loop said last-named loop moving' meansfhas 'advanced the loop section to a position to permit another loop to be formed, and means for raising the closed end of the loops into a position above the plane of the loops.

2. In a wire-shaping machine, a stationary die having a wire-receiving groove associated therewith and wire-shaping edges making an acute angle with said groove, a transversely moveable die having a groove normally aligned with the wire-receiving groove and having tapered sides,

one of which cooperates with the wire-shaping edge of the stationary die when the transversely moveable die has moved to the limit of its travel in one direction andhas formed a loop in the Wire, a longitudinally moveable die moveable in Y the direction of the length ofthe-wire and having a wire-receiving groove therein for receiving the wire, the longitudinally moveable die having a wire-shaping edge making an acute angle with the groove in the die, the wire-shaping edge of the longitudinally moving die cooperating withA the other tapered side of the transversely movel ceive the formed loop that is moved by the loop moving means which moves the loop in the direction of the wire, and means associated with the loop moving means for transferring the formed loop to the loop receivingmember.

3. In a wire-shaping machine, means for stepwise feeding a wire in the direction of its length, a stationary die having an inclined wire-shaping edge, a transversely-moveable wedge-shaped die Y having wire-shaping edges lying in the samel plane and converging toward one end of that die and diverging toward the opposite end thereof, means for moving said moveable die transversely to the wire and at the same time moving one of its wire-shaping edges toward the inclined edge of the stationary die, the transversely-moveable f die'having a loop-forming portion lying parallel Y to the line of wire travel and having one of its abovethe transversely moveable die, means for moving the'raised loop toward and over the stationary die, a loop retaining member placed adjacent tothe stationary die and having grooves for receiving the loop that has been advanced by the last-named loop moving means, the loop moving means being returned in its movement to overlie the transverse die during the latters movement to form the next loop, additional looplifting means actuated with the first-named loop lifting means for freeing the section of formed.

Y loops'from the loop retaining member and for temporarily connecting the formed loops with said last-named loop moving means, whereby the formed loops will be advanced to a position where another loop can be formed by the transversely moveable die, means for returning the formed loop section to the loop retainingmember when Wire-shaping Aedges cooperating with the inclined edge of'the stationary die to press one side of the loop into inclined relation to the wire, a second moveable die having an inclined wireshaping edge inclined opposite to the inclined edge of the stationary die and paralleling and die just prior to said first-named means advancing the wire one step. Y

4. In a wire-shaping machine, means for stepwise feeding a wire in the directionof its length, a stationary die having an inclined wire-shaping edge, a transversely-moveable wedge-shaped die having wire-shaping edges lying in the same plane and converging toward one end of that die and diverging toward the opposite end thereof,

augen,

with the `inclined edge: of the stationary dieV to press oneI side of the loop into inclined relationv to the wire, a second moveable die having an inclined wire-shaping edge inclined opposite to the inclined edge oi the stationary die and` paralleling and cooperating with the other wire-shaping' edge of thel transversely-moveable die for pressingrthe other side oi the loop into inclined relation to the wire, the sides of the loop diverging from each other from` the open to the closed ends of theV loop,` means formoving both moveable dies means for lifting the loopfrom the wedge-shaped, die just prior tot said first-named means advancing the wire one step and means :for` crimping the portions of thefloop adjacent to the closed end for moving the closed end out of theV plan of the loop.

5. In a wire-shaping machine, means for holding spaced portions of a wire, a wedge-shaped die moveable transversely to the length of the wire and with its plane paralleling the Wire length and between the spaced holding means, the die engaging with the; wire to bend it into an open-- ended loop whose plane parallels the plane off the die, a. stationary die: having inclined grooves Vfoir:

length. of the wire and into registration with the other transversely-inclined. grooves and thev grooves associated with the stationary' die, the loop-lifting -means being retractable for transl ferring the advanced loop to the registering,

grooves, and means for bending the closed end of the loop while the loop is confined in the grooves so that the closed end will lie out ofthe plane of the loop.

7. In a wire-shaping machine, a stationary die having a groove associated therewith for receivtoward the stationary die to form the loop, l.

receiving the sides of the loop, and a set of grooves associated therewith for receiving lthe causing the stationary and the second-named moveable dies to press the wire loopabout the* transversely-moveable die, the dies having ,cooperating wire-shapingv edges to press the sides of` the loop into diverging relation with one another from the open to the: closed ends of the loop, means for lifting the formed loop from" the transversely-moveabledie in a direction at right angles to the plane of the loop and means for advancing the lifted loop inthe direction of the length of the wire and. into` registration with the other grooves associated with` the stationary die', the loop-lifting means being retractable for transferring the advanced loop to the registering grooves. v

6. In a wire-shapingmachine, means forholding` spaced portions of a wire, a wedge-shaped dieI moveable transversely to the length ofA the wire and with its plane paralleling the wire length and between the spaced holdingv means, the die engaging' with the wire to` bend it into an open-` ended loop whose plane parallels the planeof the die, a: stationary die having inclined grooves for' receiving the. sides of the loop and a set of grooves associated therewith for receiving the loopedk portions of the wire,` a second moveable die, means for moving the two moveable dies. for causing the stationary and the second-named moveable dies to press the wire loop about. the transversely-moveable die, the dies having cooperating wire-shaping edges toV press the. sides of the loop into diverging relation with one another from the open to the closed ends of` the loop, means for lifting the formed loop from the transversely-moveable die in a direction at right angles to the plane of the loop, means forl advancng the lifted` loop in the direction of the transversely-inclined grooves and the` ing a Wire and also having an inclined wireshaping edge, a transversely moveable wedgeshaped die having a wire-receiving groove thereineregisteringl with the rst-named groove when the moveable die is in normal position, said moveable` die having wire-shaping edges converging toward one. end of that die and diverging toward the opposite end thereof, means for moving the moveable die transversely to the wire with one of its wire-shaping edges moving toward the inclined edge of the stationary die, a second moveable die having a groove registering with the other two grooves for receiving the wire, the second moveable die having an inclined Wireshaping edge inclined opposite to the inclined edge of the stationary die and paralleling and cooperating with the other wire-shaping edge of the transversely-moveable die, the moveable dies being moveable so that the transversely-moving die will form a loop in the wire, and the stationary die and other moveable die will cooperate with. the transversely-moving die to form theloop with a closed end and sides diverging relative to one another from the open to the closed ends of the loop, and means for lifting the'Y formed loop above the transversely-moveable die to clear the formed loop therefrom.

y8. In a wire-shaping machine, a stationary die having a groove associated therewith for receiving a wire and also having an inclined wireshaping edge, a transversely moveable wedgeshaped die having a wire-receiving groove therein registering with the iirst-named groove when the moveable die is in normal position, said moveable die having wire-shaping edges converging toward one end oi that die and divergingV toward the opposite end thereof, means for moving the movable die transversely to the wire with one of' its wire-shaping edges moving toward the inclined edge of the `stationary die, a second move` able die having a groove registering with the other two grooves for receiving the wire, the second moveabe die having an inclined wire-shaping edge inclined opposite to the inclined edge of the stationary die: and paralleling and cooperating with the other wire-shaping edge of the transversely-moveable die,` the moveable dies.

being moveable so that the Vtransversely-moving die will form a loop inthe wire, and 'the stationary die and other moveable die will cooperate with the transversely-moving die to form: the loop lwith a closed end and sides diverging relative to one another from the open to the closed ends of the loop, means for lifting the formed loop above the transversely-movable die to clear the formed loop therefrom, means for advancing the raised loop over the stationary die, and a loop-retaining member placed adjacent to the stationary die and having grooves for receiving the loop that has been advanced by the-loopadvancing means.

9. In a 'wire-shaping, machinea stationary die having an inclined` edge anda groove associated therewith for receiving a wire,` a: wedge-shaped moveable die having a wire receivinggroove'l thereinregistering with the first-named groove when the moveable die is in normal position,v

means for moving the moveable die transversely to the wire and toward the stationary die, a second moveable die having an inclined edge and a groove normally registering with the other two grooves for receiving the wire, the wedge-shaped die having its sides disposed opposite and paralleling the adjacent inclined edges oi the stationary and second movable dies, means for moving both moveable dies so that the transversely moving die will form a loop in the wire and the stationary die and the other moveable die will cooperate with the transversely moving die to form a loop with a closed end and inwardly inclined sides, means for lifting the formed loop above the transversely moveable die, means for moving the raised loop toward and over the stationary die, a loop retaining member placed ad-` jacent to the stationary die and having groovesV for receiving the loop that has been advanced by the last-named loop moving means, the loop moving means being returned in its movement to overlie the transverse die during the latters' movement to form the next loop, additional loop-A lifting means actuated with the rst-named loop lifting means'for'freeing the section of vformed loops from `the loop retaining member and for temporarily connecting the formed loops with said last-named loop moving means, whereby the formed loops will be advanced to a position where another loop can be formed by the transversely moveable die, and means for returning the formed loop sectonto the loop-retaining member when said last-named loop moving means has advanced the loop section to Va position to permit another loop to be formed.

10. In a wire-shaping machine, a stationary die having a wire-receiving groove associated therewith and a wire-shaping edge making an acute angle with the groove, a transverselymoveable die having a groove normally aligned with said wire-receiving groove and having tapered'sides, one side of which parallels the wire-shaping edge of the stationary die at all times and cooperates therewith in forming an inclined side of a loop when the transverselymoveable die has moved to the limit of its travelV in one direction and has formed a closed end loop in the wire,l a longitudinally-moveable die moveable in the direction of the length of the wireand having a wire-'receiving groove therein for receiving the wire, the longtudinally-movev able die having a wire-shaping edge making an acute angle with the groove in that die, the wireshapingV edge of the longitudinally-moving die length of the wire a distance equal to the width of the loop; and means for moving the dies, looplifting means and loop-moving means in proper sequence to form the wire into a plurality of similar loops in which the adjacent loo-ps extend in opposite directions.

`l.'11.ilnfawire-shaping machine, a stationary die 'having a wire-receiving groove associated therewith and 'a wire-shaping edge making an acute angle with the groove, a transverselymoveable die having a groove normally aligned with said wire-receivingl groove and having tapered sides, one side of whichV parallels the wire-shaping edge of the stationary die at all times and cooperates therewith'in forming an inclined'side of a loop when the transverselymoveable'die'has moved to the limit of its travel' Y in one direction and has formed a closed end loop in the wire, a longitudinally-moveable die moveable inthe direction of the length of the wire and having a wire-receiving groove therein for receiving the wire, the vlongitudinally-moveable die. havingY a wire-shaping edge making an acute angle with the groove in kthat die, the wire-shap` ing edge of the longitudinally-moving die paralleling the other tapered side of the transversely-moveable die at all times and cooperates therewith in forming an inclined side ofthe loop when both moveable dies have moved to the limit ofA their travel .inone direction, the wire-shaping edges of the stationary and longitudinally-moving dies being inclined in opposite directions relative to one another, whereby the sides of Y the loop will diverge with respect to eachother from the open to the closed end of the loop, means for lifting the loop Vfrom the transverse die,

means for moving the lifted loop in the direction of Ythe length of the wire a distance equal to the width of the loop; -and means for 'moving'the dies, loop-lifting means and loop-moving means in-propersequence to form-the wire into a plurality of similar Vloops inwhich' the adjacent f loops extend ini opposite directions; and meansf for successively raising the closedA ends of alter-V nate loo-ps after the loops have been freed from the transversely-moving' die so `that these ends' willV extend above the plane of the loops.

12. In a wire-shaping'machine; spaced apart movable and stationary wire-shaping members having their adjacent ends inclined with respect ,to each other;` a wedge-shaped die movable transversely in the space provided between the members and having ts'wedge-shaped sides disposedv opposite and paralleling the'adjacent inclined ends of the wire-shaping members; means for gmoving the wedge-shaped die and the movable' wire-shaping member toward the stationary memberfor causing the die and the two membersv to cooperate and form a loop in the wire with the sides of the loop diverging relative to one another from the open to the closed end of the loop; meansv forvlifting the formed loop from the die; saidstationary-member having a loop receiving portion with grooves shaped for receiving vthe formed loop; a loopmoving member for receiving the loop freed lfrom the' die by the loop removing.

means and for moving the loop to a positionabove the loop retaining portion and in registration with'` thev grooves; and means for transferring the loop'- from the said loop moving member to theV loop' receiving portion.

13. In a wire-shaping machine;' spaced apart" movable and stationary wire-shaping members' having their adjacent ends inclined with respect to each other; a wedge-shaped die movable trans` versely in thespace provided between the members and havingV its wedge-shaped sides disposed opposite and paralleling` the adjacent inclined ends of the wire-shaping members; means for moving the wedge-shaped die and the movablewire-shaping member toward the stationary member for causing the die and the two members to cooperate and form a loop in the wire with the sides of the loop diverging relative to one another from the open to the closed end of the loop; means for lifting the formed loop from the die; said stationary member having a loop receiving portion with grooves shaped for receiving the formed loop; a loop moving member for receiving the loop freed from the die by the loop removing means and for moving the loop to a position above the loop retaining portion and in registration with the grooves; means for transferring the loop from the said loop moving member to the loop receiving portion; an auxiliary loop removing means for lifting the formed loops from the loop receiving portion when the loop lifting means removes the loop from the die; and means for actuating both the loop lifting means and the auxiliary loop removing means simultaneously and for returning the loop lifting means to starting position to permit the die to return to starting position.

14. In a wire-shaping machine; spaced apart movable and stationary wire-shaping members having their adjacent ends inclined with respect to each other; a wedge-shaped die movable transversely in the space provided between the members and having its wedge-shaped sides disposed opposite and paralleling the adjacent inclined ends of the wire-shaping members; means for moving the wedge-shaped die and the movable Wire-shaping member toward the stationary member for causing the die and the two members to cooperate and form a loop in the wire with the sides of the loop diverging relative to one another from the open to the closed end of the loop; means for lifting the formed loop from the die; said stationary member having a loop receiving portion with grooves shaped for receiving the formed loop; a loop moving member for receiving the loop freed from the die by the loop removing means and for moving the loop to a position above the loop retaining portion and in registration with the grooves; means for transferring the loop from the said loop moving member to the loop receiving portion; an auxiliary loop removing means for lifting the formed loops from the loop receiving portion when the loop lifting means removes the loop from the die; means for actuating both the loop lifting means and the auxiliary loop removing means simultaneously and for returning the loop lifting means to starting position to permit the die to return to starting position; said loop moving member receiving the loop from the die and the formed loops from the loop receiving portion; the loop moving member moving the formed loop into an advanced position with respect to the loop receiving portion; whereupon the loop transferring means will remove the loops from the loop moving member to the loop receiving portion when the auxiliary loop removing means returns to starting position.

15. In a wire-shaping machine; spaced apart movable and stationary wire-shaping members having their adjacent ends inclined with respect to each other; a wedge-shaped die movable transversely in the space provided between the members and having its wedge-shaped sides disposed opposite and paralleling the adjacent inclined ends of the wire-shaping members; means for moving the wedge-shaped die and the movable wire-shaping member toward the stationary member for causing the die and the two members to cooperate and form a loop in the wire with the sides of the loop diverging relative to one another from the open to the closed end of the loop; means for lifting the formed loop from the die; said stationary member having a loop receiving portion with grooves shaped for receiving the formed loop; a loop forming member for receiving the loop freed from the die by the loop removing means and for moving the loop to a position above the loop retaining portion and in registration with the grooves; means for transferring the loop from the said loop moving member to the loop receiving portion, and means for crimping the closed end of the loop for positioning this end above the plane of the loops.

16. In a Wire-shaping machine; spaced apart movable and stationary wire-shaping members having their adjacent ends inclined with respect to each other; a wedge-shaped die movable 'transversely in the space provided between the members and having its wedge-shaped sides disposed opposite and paralleling the adjacent inclined ends of the Wire-shaping members; means for moving the wedge-shaped die and the movable Wire-shaping member toward the stationary member for causing the die and the two members to cooperate and form a loop in the wire With the sides of the loop diverging relative to one another from the open to the closed end of the loop; means for lifting the formed loop from the die; said stationary member having a loop receiving portion with grooves shaped for receiving the formed loop; a loop moving member for receiving the loop freed from the die by the loop removing means and for moving the loop to a position above the loop retaining portion and in registration with the grooves; means for transferring the loop from the said loop moving member to the loop receiving portion; an auxiliary loop removing means for lifting the formed loops from the loop receiving portion when the loop lifting means removes the loop from the die; means for actuating both the loop lifting means and the auxiliary loop removing means simultaneously and for returning the loop lifting means to starting position to permit the die to return to starting position; said loop moving member receiving the loop from the die and the formed loops from the loop receiving portion; the loop moving member moving the formed loop into an advanced position with respect to the loop receiving portion; whereupon the loop transferring means will remove the loops from the loop moving member to the loop receiving portion when the auxiliary loop removing means returns to starting position, said loop transferring means being spring actuated for effecting the transfer as the auxiliary loop removing means returns to starting position.

FLORIAN F. DAUENHAUER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 456,533 Bold July 21, 1891 795,214 Flowers July 18, 1905 1,031,599 Todd i July 2,1912 1,122,092 Fedders Dec. 22, 1914 1,337,504 Bloemaker Apr. 20, 1920 1,561,594 Civis Nov. 1'?, 1925 2,397,502 Watt Apr. 2, 1946 

